Michael Creasy has a blog
Until recently Michael was one of the most prolific testers that the Speech group ever had (and consequently the bane of developers' lives...). Unfortunately for us, he recently moved to the Media Center group where he is playing with lots of cool toys.
He just started a blog at http://blogs.msdn.com/mcreasy where you can read about his exploits, and the sorts of things you can do with the Media Center APIs. He promises me that he's going to be speech-enabling his Media Center PC at home so I look forward to see what he comes up with.